Pretty much any hero from the Animated Series, Justice League & Justice League Unlimited.
You know, this show?
As long as they where in one episode, that counts!
Deadline will probably be something along the lines of one year. (Hopefully less time, but hey no worries. The latest deadline will be Late Summer of 2014, at the latest).
Here's a list of characters. Only the hero's! (Any version included in the show is cool, the list includes the comic characters, sorry!)
Me- Batman & Martian Manhunter
LucyKitsch- Wonder Woman & Zatana
AxxKat-Hawkgirl & Vixen
Shannon- Green Arrow & Black Canary
Krahka- Booster Gold & Blue Beetle [Ted Kord]
DTChris- Huntress & Nightwing
Pagangirl86 - Gypsy
Paperraine - Crimson Fox & Power Girl